JP4141222B2 - Free access floor panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a free access floor panel used for a free access floor that can secure a space for storing wiring, supplying and exhausting air, etc. under the floor of an office or a clean room.
[0002]
[Prior art]
As shown in FIG. 8, for example, the steel sheet free access floor panel includes a bottom sheet 4 that is recessed so that the groove-shaped portion 14 inside the periphery has a depth, and a flat plate-like top sheet 6. Consists of.
[0003]
In order to improve the strength inside the groove-shaped part 14 of the bottom sheet 4 of the panel 2 for free access floors, first reinforcing restricting parts 8 are formed at a number of locations. The first reinforcing drawing portion 8 is formed into a substantially hemispherical shape as shown in FIG. 8 by press drawing processing, and a flat portion 10 is formed at the tip thereof, and is arranged in a large number of places as shown in FIG. Is provided.
[0004]
A groove-shaped portion 14 is formed slightly inside the peripheral edge portion 12 so as to surround the first reinforcing diaphragm portion 8. Then, as shown in FIG. 8, the bottom sheet 4 has its peripheral edge 12 and the flat portion 10 at the tip of the first reinforcing restrictor 8 abutted against the top sheet 6, and these abutments are spot welded. For example, the bottom sheet 4 is integrally fixed to the top sheet 6.
[0005]
[Problems to be solved by the invention]
However, when a free access floor is formed using such a free access floor panel 2, support legs as shown in FIG. 9 are provided in each of the square holes 16 formed at the four corners as shown in FIG. 7. One of the four protrusions 22 provided on the upper surface 20 of the adjustment base 18 is inserted. Then, as shown in FIG. 10, each corner portion of the four free access floor panels 2 is supported by one adjustment stand 18.
[0006]
Therefore, when a large load of a predetermined value or more is applied from the upper side of the panel 2 for the free access floor, there is a risk of insufficient strength, such that the amount of bending at the center of the panel or the center of each side increases. It was.
[0007]
Then, this invention makes it a subject to provide the panel for free access floors which can improve the intensity | strength with respect to the load from an upper side.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, a panel for a free access floor according to the present invention is:
A free access floor panel comprising a flat top sheet and a bottom sheet having a recess, and a plurality of first reinforcing restrictors formed on the bottom sheet,
And forming a second reinforcing restricting portion formed so that adjacent portions of the plurality of first reinforcing restricting portions arranged adjacent to each other at the center portion of the bottom sheet are integrally continuous .
A reinforcing rib is formed on a flat portion formed so as to contact the top sheet on the front end side of the second reinforcing restricting portion so that a surface opposite to the top sheet is raised and a back surface thereof is recessed. It is a feature.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a free access floor panel according to the present invention will be specifically described with reference to the drawings.
FIGS. 1 to 6 are views referred to for explaining an embodiment of a panel for a free access floor according to the present invention.
[0010]
The free access floor panel 32 according to one embodiment of the present invention shown in the above figure is described by attaching the same reference numerals to the same parts as those of the conventional free access floor panel 2 and the conventional parts thereof. The redundant description of the same configuration as in FIG.
[0011]
As shown in FIG. 1, a second reinforcing restricting portion 36 larger than a large number of the surrounding first reinforcing restricting portions 8 is formed at the center of the bottom sheet 34. The shape of the second reinforcing restricting portion 36 is formed by press drawing so that adjacent portions of the four first reinforcing restricting portions 8 arranged in a square shape are integrally continuous. .
[0012]
A substantially X-shaped flat portion 38 as shown in FIGS. 3 and 4 is formed in the central portion on the front end side (top sheet 6 side) of the shape of the second reinforcing restricting portion 36. The portion 38 is in contact with the top sheet 6 so that the area for receiving the top sheet 6 is increased.
[0013]
By forming the second reinforcing throttle 36 larger than the first reinforcing throttle 8 at the center of the bottom sheet 34, the strength against the load applied from the upper side of the free access floor panel 32 is improved. be able to.
[0014]
As shown in FIGS. 3 and 4, the flat portion 38 of the second reinforcing restrictor 36 has a reversal direction opposite to that of the second reinforcing restrictor 36, and the inner surface is raised and the outer surface is recessed. Ribs 40 are formed along the radial direction of the flat portion 38.
[0015]
For this reason, since the strength of the flat portion 38 of the second reinforcing diaphragm 36 can be improved by the reinforcing rib 40, the strength against the load applied from the upper side of the panel 32 for the free access floor can be further improved.
[0016]
As shown in FIG. 1, a third reinforcing throttle 42 is formed inside the center of each side of the bottom sheet 34. As shown in FIG. 2, the third reinforcing restricting portion 42 is formed so that a plurality of first reinforcing restricting portions 8 are connected along the direction of each side in the vicinity thereof, and is a flat surface that contacts the top sheet 6. The area of the portion 44 is larger than the flat portion 10 of the first reinforcing diaphragm 8.
[0017]
By forming the third reinforcing restricting portion 42 inside the central portion of each side of the bottom sheet 34, the strength against the load applied from the upper side of the free access floor panel 32 can be further improved.
[0018]
On the other hand, as shown in FIGS. 1 and 2, the groove-shaped portion 14 between the peripheral portion of the bottom sheet 34 and the plurality of first reinforcing restricting portions 8 is close to each side of the bottom sheet 34 at its four corners. The bulging part 14a which bulges is formed, and the square hole 16 (hole) as shown in FIG. 1 is formed in the bottom face of the bulging part 14a. For this reason, the square holes 16 can be disposed closer to the corners of each side of the bottom sheet 34 than in the case where the bulging portion 14 a is not formed.
[0019]
Therefore, as shown in FIG. 5 and FIG. 6, a support leg adjustment base 48 used for supporting a free access floor panel made of, for example, aluminum die casting, different from the steel free access floor panel 32 according to the present invention. Further, the area of the upper surface 50 is smaller than that of the conventional support leg adjusting base 18, and the interval between the protrusions 52 is larger than that of the conventional protrusion 22 of the support leg adjusting base 18 used for the steel free access floor panel 2. Even if it is narrow, it can be used in combination.
[0020]
For this reason, the steel sheet free access floor panel 32 and the aluminum die cast free access floor panel are adjacent to each other so that the steel sheet and aluminum die cast free access floor panels are formed. It is also possible to form a free access floor.
[0021]
For this reason, when it is desired to replace the inexpensive free-floor floor panel 32 made of steel plate in a portion where it is not necessary to place an expensive free-floor free-access floor panel, or the free-floor floor made of aluminum die-casting. Even if you want to change the layout of the free access floor where the panel for steel and the free access floor panel 32 made of steel are mixed, there is no need to use and replace the support leg adjustment table and change the arrangement position. Since all can be handled by the same support leg adjustment stand, the workability can be improved and the construction cost can be reduced.
[0022]
【The invention's effect】
As described above, according to the free access floor panel according to the present invention, by improving the strength of the central part and the central part of each side, a load of a predetermined value or more is applied from the upper side of the free access floor panel. Even if it adds, the amount of bending can be reduced and the strength of the panel for free access floors can be improved.
[0023]
Also, since the holes provided in the four corners of the bottom sheet can be arranged closer to the corners than the conventional ones, the support leg adjustment base used for different materials such as aluminum access panels for free access floors Can also be used.
[Brief description of the drawings]
FIG. 1 is a bottom view of a free access floor panel 32 as viewed from the bottom sheet 34 side according to an embodiment of the present invention.
2 is a cross-sectional view taken along the line AA of the free access floor panel 32 in FIG. 1;
FIG. 3 is an enlarged view of a second reinforcing throttle 36 at the center of the free access floor panel 32 in FIG. 1;
4 is a cross-sectional view taken along line B-B of the second reinforcing throttle 36 in FIG. 3;
FIG. 5 shows adjacent free access floors in a state where corners of a free access floor panel 32 of the present invention are placed on a support leg adjusting base 48 used for an aluminum die cast free access floor panel. FIG.
6 is a top view of each corner of the support leg adjusting base 48 and the four free access floor panels 32 supported by the support leg adjustment base 48 in FIG. 5;
FIG. 7 is a bottom view showing a conventional free access floor panel 2 made of a steel plate.
8 is a cross-sectional view taken along the line CC of the free access floor panel 2 in FIG. 7;
FIG. 9 is a partial side view showing a state in which corners of a steel plate free access floor panel 2 are placed on a support leg adjusting base 18 used in a conventional steel plate free access floor panel.
10 is a top view of each corner of the supporting leg adjusting base 18 and four free access floor panels 2 supported by the supporting leg adjusting base 18 in FIG. 9;
[Explanation of symbols]
2 Free access floor panel 4 Bottom sheet 6 Top sheet 8 First reinforcing diaphragm 10 Flat part 12 Peripheral part 14 Groove shaped part 16 Square hole 18 Support leg adjusting base 20 Upper surface 22 Projection part 32 Free access floor panel 34 Bottom Sheet 36 Second reinforcing restrictor 38 Flat part 40 Reinforcing rib 42 Third reinforcing restrictor 44 Flat part 48 Support leg adjusting base 50 Upper surface 52 Projection part

Claims (3)

A free access floor panel comprising a flat top sheet and a bottom sheet having a recess, and a plurality of first reinforcing restrictors formed on the bottom sheet,
And forming a second reinforcing restricting portion formed so that adjacent portions of the plurality of first reinforcing restricting portions arranged adjacent to each other at the center portion of the bottom sheet are integrally continuous .
A reinforcing rib is formed on a flat portion formed so as to be in contact with the top sheet on the front end side of the second reinforcing restricting portion so that a surface opposite to the top sheet is raised and a back surface thereof is recessed. Characteristic free access floor panel. 2. The panel for a free access floor according to claim 1, wherein a third reinforcing restricting portion larger than the first reinforcing restricting portion is provided inside a central portion of each side of the bottom sheet. Form bulges that bulge so as to approach each side of the bottom sheet at the four corners of the recess of the bottom sheet, and form holes into which the protrusions of the support leg adjustment base can be inserted on the bottom surface of the bulge The panel for free access floors according to claim 1 or 2 characterized by things.

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